Hello,

anyone has an idea what it might be? I'm trying upgrade board from 4.4 to 4.7, all files uploaded, PHP 8 is on and that error on admin/upgrade occured:

Look in init.php, and in defaultConstants() make sure SITE_FILES_PATH is present in the CODING SHORTCUTS section. If it's not present, then the files did not upload properly.

It was a..... wrong FTP account! Both working, but uploaded files on wrong one.